• Refactor: Swapped lazy_static for OnceLock, std::sync::Mutex for parking_lot::Mutex, and improved channel/terminal cleanup
• Bug: Fixed crashes with empty device list, wrong-device characteristics, GATT read/write offset handling, and UUID string slicing
• Enhancement: Memory limits (logs, characteristic values, devices, input), UTF-8 cursor movement, bracketed paste, and cleaner shutdown
• Enhancement: More robust error handling in scan/connect and GATT server validation
• Enhancement: Broader test coverage and dev-dependencies for tests